<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <!-- 黑马logo -->
        <img src="@/assets/logo.png" alt="" />
        <!-- 顶部标题 -->
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout"> 退出 </el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          :unique-opened="true"
          :collapse-transition="false"
          :collapse="isCollapse"
          router
          :default-active="activePath"
        >
          <!-- 是否使用vue-router的模式，启用改模式会在激发活导航时以index作为path进行路由跳转 -->
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级子菜单 -->
            <el-menu-item
              :index="'/' + subItem.path + ''"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <!-- 二级菜单模板 -->
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 主体结构 -->
      <el-main>
        <!-- 路由占位字符 -->
        <!-- 1创建一个组件当做主体
           2 引入路由中在home做子组件 定向组件
           3占位-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      activePath: "",
      menuList: null,
      iconsObj: {
        //   把字体图标用对象的的形式保存下来然后遍历
        125: "iconfont icon-user",
        103: "iconfont icon-tijikongjian",
        101: "iconfont icon-shangpin",
        102: "iconfont icon-danju",
        145: "iconfont icon-baobiao",
      },
      isCollapse: false,
    };
  },
  methods: {
    logout() {
      // 退出按钮
      // 清除本地存储 token
      // 编程路由this.$router.push()
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //  获取数据
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
      console.log(res);
    },
    // 是否折叠
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    // 被选中的时候停留在这个列表上永久显示颜色
    saveNavState(activePath1) {
      window.sessionStorage.setItem("activePath", activePath1);
      this.activePath = activePath1;
    },
  },
  computed: {},
  watch: {},
  filters: {},
  components: {},
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  mounted() {},
};
</script>

<style scoped lang='less'>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0%;
  color: #fff;
  font-size: 20px;
  align-content: content;
  > div {
    display: flex;
    align-items: content;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.toggle-button {
  color: #fff;
  font-size: 20px;
  text-align: center;
  line-height: 40px;
  background-color: #4a5064;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
